Fehr, H. F., & Phillips, J. M. (1972). Teaching modern mathematics in the elementary school (2d ed.). Addison-Wesley Pub. Co..
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Dyfyniad Arddull Chicago
Fehr, Howard F., and Jo McKeeby Phillips. Teaching Modern Mathematics in the Elementary School. 2d ed. Reading, Mass.: Addison-Wesley Pub. Co., 1972.
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Dyfyniad MLA
Fehr, Howard F., and Jo McKeeby Phillips. Teaching Modern Mathematics in the Elementary School. 2d ed. Addison-Wesley Pub. Co., 1972.
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Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.